Starlets, super models and high school prom queens aren't the only ones savvy to the proper application of make-up these days. Have you noticed the wide array of spray-on color enhancers for horses that are available at major tack stores? That's right: If your horse is blessed with a set of white stockings, now you can make his legs sparkle with a dose of white powder spritzed from a spray can. But it doesn't stop there. Colors include two shades of sorrel red, black and gray. While practical use dictates that a horse with a temporary blemish could benefit from a spot paint job before entering the show-ring, some show horses are subjected to makeovers as part of their preparation. Paints, for example, sometimes have their contrasting patches of colors highlighted by, well, a temporary paint job. Don't worry, though. These spray-on colors are as harmless as kindergarten water colors. They are easily removed with a damp brush or a shower. (While most show organizations permit color enhancement, it's always a good idea to check your show rules before using a product.)